DE102016203209B4 - At least partially electrically operated motor vehicle - Google Patents

Abstract

Motor vehicle which is at least partially electrically operated, comprising a floor structure (2) of a motor vehicle body (1) and a traction battery (4) which is arranged on an underside of the floor structure (2) and connected to it, the floor structure (2) having a has a central tunnel (3) extending in the longitudinal direction of the vehicle with a downwardly open profile, on the central tunnel (3) several reinforcing struts (5, 6) that stiffen the central tunnel (3) and are firmly connected to it, at least on the traction battery (4) attached to a part of the reinforcement struts (5, 6) and at least one reinforcement strut (6) is arranged bridging the center tunnel (3), characterized in that the floor structure (2) on both sides of the center tunnel (3) at least one substantially in each case Transverse vehicle direction extending cross member (7), each with its end portion facing the center tunnel (3) with the mit teltunnel (3) is firmly connected and the at least one reinforcement strut (6) bridging the central tunnel (3) is arranged such that it connects the respective end sections of the cross members (7) on both sides of the central tunnel (3).

Description

The present invention relates to an at least partially electrically operated motor vehicle according to the preamble of claim 1.

In such a motor vehicle, such as a hybrid electric vehicle with a combustion engine, a plug-in hybrid vehicle or a plug-in hybrid vehicle or a purely electric vehicle, a large traction battery, which essentially supplies one or more electric motors to drive the motor vehicle, must be used Electrical energy guaranteed to be housed in the motor vehicle. It is known to arrange such a traction battery below a floor structure of a body of the motor vehicle and to connect it to it, such as the US 8 702 161 B2 and the US 2015/0 239 331 A1 demonstrate.

A particular challenge in the development of the motor vehicle body is to make optimum use of the installation space, which is severely limited by the ground clearance of the motor vehicle and the passenger cell. In addition, the body must provide sufficient rigidity in order to ensure the integrity of the passenger compartment and the traction battery in the event of a collision of the motor vehicle with an obstacle. In addition, the vehicle body must offer mounting options for the traction battery and the vehicle seats, for example.

From the US 8 646 790 B2 Furthermore, a vehicle body of an electric vehicle for protecting a traction battery from damage in the event of a frontal collision of the vehicle with an obstacle is known. In this case, part of a subframe of the vehicle body is pushed under the traction battery with the aid of ramp-shaped elements in the case of a frontal collision, thereby protecting it from damage.

The DE 10 2012 108 816 A1 describes a battery support device for a vehicle, with the aid of which a vehicle battery can be arranged under a vehicle body and connected to it. The vehicle battery comprises a battery pack arranged to the left of a floor tunnel and a battery pack arranged to the right of the floor tunnel. In the event of a side impact, the battery carrying device enables the battery pack to be displaced in the transverse direction of the vehicle, whereby it is protected from deformation or damage by the side impact force.

The JP H06- 321 137 A discloses a body for an electric vehicle with a rear and a front floor pan, a center tunnel extending along a longitudinal direction of the vehicle, and at least one battery, the battery being fastened to the body below the front floor pan by means of clamps.

The US 7 073 824 B2 relates to a fuel tank which is arranged on the underside of a floor plate under a driver's seat and a passenger seat. A rearwardly protruding part of the fuel tank is accommodated in floor tunnels which are formed in the floor panel. A fuel supply line is connected to the rear end of the protruding part. As a result, not only can the capacity of the fuel tank be increased by utilizing an interior space of the floor tunnel, but the resistance to the fuel supplied to the fuel tank can also be reduced by shortening the fuel supply pipe. The US 7 073 824 B2 however does not relate to the arrangement of a tra ctionsbatterie like the present invention.

The JP 2014 - 101 009 A relates to a protection device for a battery attached to a motor vehicle. The protection device is formed on a vehicle frame in the periphery of the battery. The frame consists of an energy-absorbing part and a protective part. The energy-absorbing part is relatively easy to deform, while the protective part is rigid. The protective part is arranged facing the battery.

The DE 20 2014 102 281 U1 relates to a vehicle chassis structure comprising a beam, a battery spaced inwardly from the beam, and a non-interfering support member extending between the battery and the beam for absorbing a side impact force, including a longitudinal portion that attaches to a Side region of the battery contiguous, and a pair of side portions that extend outwardly at an angle from spaced locations on the longitudinal portion and abut adjacent to the carrier to define an enclosed area.

From the US 7 836 999 B2 a fuel cell accommodated in a center tunnel of a vehicle body is known. The motor vehicle comprises a cross member extending over the entire width of the vehicle, the end sections of which, however, are not directly connected to the tunnel. Rather, the tunnel is connected to the side members running there at the points on the outside.

The DE 10 2016 000 366 A1 is directed to a lower vehicle body structure of a vehicle including right and left side sills, which extend substantially in a vehicle longitudinal direction on both outward sides in a vehicle width direction of a vehicle body, right and left hinge columns which extend substantially upward from respective front positions of the right and left side sills, right and left central columns which extend extending substantially upward from respective middle positions in the vehicle longitudinal direction of the right and left side sills, a floor panel connected to the right and left side sills, and a floor tunnel protruding upward at a central portion of the floor panel. Furthermore, the disclosed body structure has a cross member, the end sections of which are connected to the floor tunnel or bridge it. The arrangability of a traction battery is - in contrast to the present invention - from the DE 10 2016 000 366 A1 not known.

Furthermore, the US 2013/0 229 030 A1 a floor structure of a motor vehicle with a large battery unit, which is arranged below the floor structure, wherein the floor structure is designed to protect the battery unit from deformation or damage in the event of a side impact. For this purpose, an upper transverse strut running in the transverse direction of the vehicle and a lower transverse strut running in the transverse direction of the vehicle are provided, which are each connected at their outer ends to longitudinal members running in the longitudinal direction of the vehicle. The battery unit is arranged between the two cross struts, so that the side impact force acting on one of the side members in the event of a side impact is absorbed and diverted by the cross struts. The floor structure disclosed also has a center tunnel through which the upper cross strut extends in the transverse direction of the vehicle, a central part of the upper cross strut being formed by a cross strut element which penetrates the center tunnel and is fastened to it.

Against this background, the present invention is based on the object of providing an at least partially electrically operated motor vehicle, such as a hybrid, plug-in hybrid or electric vehicle, with a floor structure of a motor vehicle body and with a traction battery, in which the traction battery is more compact Arrangement can be attached to the floor structure in a space-saving manner and that at the same time largely protects the traction battery from deformation and thus from damage in the event of a collision of the motor vehicle with an obstacle. In addition, the traction battery should be able to be mounted on the floor structure with only little installation effort.

This object is achieved by a motor vehicle with the features of claim 1. Further, particularly advantageous configurations of the invention are disclosed in the subclaims.

It should be pointed out that the features listed individually in the claims can be combined with one another in any technically meaningful manner and show further embodiments of the invention. The description additionally characterizes and specifies the invention, particularly in connection with the figures.

According to the invention, a motor vehicle that is at least partially electrically operated comprises a floor structure of a motor vehicle body and a traction battery which is arranged on an underside of the floor structure and connected to it. The floor structure has a center tunnel extending in the longitudinal direction of the vehicle with a profile that is open at the bottom. The center tunnel preferably has a substantially U-shaped cross section. Furthermore, according to the invention, several reinforcing struts which stiffen the center tunnel and are firmly connected to it are arranged on the center tunnel. At least one reinforcement strut is arranged in such a way that it bridges the center tunnel. The traction battery is attached to at least part of the reinforcement struts. In the context of the present invention, this is to be understood as meaning that the traction battery can be fastened directly to the reinforcing struts, but also with the interposition of an auxiliary frame in which the traction battery is received and essentially held. In the latter case, the subframe can then be attached to the corresponding reinforcement struts in addition to or as an alternative to the traction battery.

The reinforcement struts thus stabilize the center tunnel on the one hand and at the same time offer (additional) fastening options for fastening the traction battery to the floor structure. In the event of a collision of the motor vehicle with an obstacle, the center tunnel is largely protected from deformation by the reinforcing struts, since the reinforcing struts provide additional load paths for dissipating the collision forces introduced into the vehicle body and the floor structure in the event of a collision. As a result, the traction battery is effectively protected as far as possible from deformation and damage that may result from the collision.

In a case in which the traction battery itself provides load paths for dissipating collision forces due to its structure, for example by means of load struts provided in the battery or a battery housing, the Distribute collision forces to the load paths provided by the traction battery and the load paths provided by the reinforcement struts on the center tunnel, so that the mechanical stress on the traction battery is considerably reduced in the event of a collision.

A space-saving attachment of the traction battery to the floor structure of the motor vehicle is provided by the fact that by attaching the traction battery to at least part of the reinforcement struts on the center tunnel, additional fastening devices, such as fastening plates and / or fastening flanges, otherwise to be provided on the floor structure of the motor vehicle body and the traction battery, are dispensed with can be, whereby the manufacturing effort and consequently the manufacturing costs of the motor vehicle and its weight can be reduced. In addition, the reinforcement struts have the advantage of lower weight compared to a reinforcement plate attached to the center tunnel.

According to an advantageous embodiment of the invention, the open underside of the center tunnel is bridged by at least part of the reinforcement struts. The reinforcement struts can bridge the center tunnel both essentially in the transverse direction of the vehicle, for example as transverse reinforcement struts, and in any direction inclined to the transverse direction of the vehicle, for example as diagonal reinforcement struts. By bridging the open underside of the center tunnel with at least part of the reinforcement struts, its open cross section is closed, which results in a further increase in the rigidity of the center tunnel. In addition, the transverse and / or diagonal reinforcement struts reinforce the center tunnel, in particular with regard to a side impact of an obstacle against the vehicle body, in which the collision forces are introduced into the body and the floor structure essentially in the transverse direction of the vehicle. These can then be diverted by the reinforcing struts attached to the center tunnel essentially in the transverse direction of the vehicle and protect the center tunnel from deformation.

Another advantageous embodiment of the invention provides that at least some of the reinforcing struts extend essentially in the longitudinal direction of the vehicle. In this way, in particular at least one additional load path is provided through the at least one reinforcing strut running in the longitudinal direction of the vehicle in the longitudinal direction of the center tunnel. This reinforces the center tunnel in particular with regard to a frontal collision of the motor vehicle with an obstacle, since the collision forces in a frontal collision act essentially in the vehicle's longitudinal direction on the vehicle body and its floor structure and can be diverted by the at least one reinforcement strut on the center tunnel that runs essentially in the vehicle's longitudinal direction.

Another advantageous embodiment of the invention provides that the reinforcement struts are screwed to the center tunnel. The screw connection offers significant advantages, in particular with regard to easier assembly of the reinforcement struts on the center tunnel due to the very limited assembly space available during assembly. In addition, the screw connection ensures sufficient power transmission between the reinforcement strut and the center tunnel in any direction of action.

According to yet another advantageous embodiment of the invention, the traction battery is screwed to the reinforcement struts to which it is attached. In this case too, the screw connection offers significant advantages, in particular with regard to easier assembly of the traction battery on the reinforcement strut or struts due to the very limited space available during assembly. In addition, the screw connection ensures sufficient power transmission between the traction battery and the reinforcement strut in any direction of action.

According to the invention, the floor structure on both sides of the center tunnel has at least one cross member extending essentially in the transverse direction of the vehicle, which is firmly connected to the center tunnel with its end section facing the center tunnel. Here, the at least one reinforcement strut bridging the center tunnel is arranged in such a way that it connects the respective end sections of the crossbeams to one another on both sides of the center tunnel. In this way, a closed load path is formed from one cross member on one side of the center tunnel to the cross member on the other side of the center tunnel, whereby side impact forces acting in particular on the vehicle body and the floor structure can be diverted via the cross member and the reinforcement strut, which is a helps to avoid early deformation of the soil structure in the event of a collision.

The cross member (s) can be a seat cross member for fastening seating in a passenger compartment of the motor vehicle. Seat cross members are among the safety-relevant components in the vehicle and must therefore ensure the position of the seating in the event of a collision of the motor vehicle with an obstacle. In addition, the seat cross members represent an essential part of the lateral load path for side impact forces introduced into the vehicle body in the event of a side impact. You must therefore keep any deformation of the floor structure as low as possible in order to ensure sufficient survival space for the occupants of the motor vehicle. This can be ensured with the above-described arrangement according to the invention of the at least one reinforcement strut relative to the transverse or seat cross members.

According to a further advantageous embodiment of the invention, the reinforcement struts form a ladder frame structure which comprises at least two longitudinal reinforcement struts running essentially in the longitudinal direction of the vehicle and a plurality of transverse reinforcement struts connecting them to one another and bridging the center tunnel. A ladder frame designed in this way provides the center tunnel with sufficient stiffening both in terms of a frontal collision and in terms of a side collision, so that both collision forces in the longitudinal direction of the vehicle via the longitudinal reinforcement struts and collision forces in the transverse direction of the vehicle via the transverse reinforcement struts of the leadframe can be effectively dissipated.

Diagonal reinforcement struts that run at an angle to the transverse reinforcement struts and also bridge the center tunnel can also also form part of the ladder frame in order to further stiffen it. It is also conceivable, instead of the transverse reinforcement struts, to provide only diagonal reinforcement struts, which are connected to one another via the respective longitudinal reinforcement struts. In this case, the traction battery is preferably attached to the diagonal reinforcement struts, for example screwed to them.

In the above-described ladder frame arrangement of the reinforcement struts, the longitudinal reinforcement struts can be attached, preferably screwed, to the center tunnel, and the traction battery can be attached, preferably screwed, to at least part of the transverse reinforcement struts, which is particularly advantageous in terms of simple assembly.

Yet another advantageous embodiment of the invention provides that the traction battery extends in the transverse direction of the vehicle on both sides of the center tunnel and in the area of the center tunnel has a tunnel-like recess that extends in the longitudinal direction of the vehicle and follows the center tunnel. An exhaust system of an internal combustion engine of the motor vehicle preferably runs in the recess. This embodiment provides a particularly compact arrangement of the traction battery on the floor structure of the vehicle body, although it extends to both sides of the center tunnel and is arranged below the center tunnel and thus blocks free access to the interior of the center tunnel when the traction battery is installed, in which the Exhaust system, for example an exhaust pipe, could run. However, the recess in the traction battery provides the exhaust system with essentially the same space that the center tunnel itself can provide only slightly below the center tunnel.

Other line-like elements, for example brake lines, fuel lines and / or electrical lines, which preferably have a smaller diameter than the exhaust system, in particular the exhaust pipe, can particularly advantageously be accommodated in the intermediate or tunnel space running in the longitudinal direction of the vehicle, between an upper side of the traction battery or the reinforcement struts bridging the center tunnel and the center tunnel.

The height of the recess in the traction battery is preferably dimensioned such that the exhaust system, for example an exhaust pipe, is completely received in the recess of the traction battery and accordingly does not protrude downwards over the underside of the traction battery. The ground clearance of the motor vehicle can thus be further improved.

• 1 eine perspektivische Unteransicht einer Karosserie, insbesondere einer Bodenstruktur, eines Kraftfahrzeugs gemäß einem Ausführungsbeispiel der Erfindung,
• 2 eine perspektivische Unteransicht der Bodenstruktur der Karosserie aus 1,
• 3 eine Draufsicht auf die Bodenstruktur aus 2 von unten,
• 4 eine Draufsicht auf die Bodenstruktur aus 3 von unten sowie eine Querschnittsteilansicht entlang der in der Draufsicht eingezeichneten Schnittlinie A-A,
• 5 eine Draufsicht auf die Bodenstruktur aus 3 von unten sowie eine Querschnittsteilansicht entlang der in der Draufsicht eingezeichneten Schnittlinie B-B,
• 6 eine Draufsicht auf die Bodenstruktur aus 3 von unten sowie eine Querschnittsteilansicht entlang der in der Draufsicht eingezeichneten Schnittlinie C-C,
• 7 eine erste Anordnung leitungsähnlicher Elemente in einem Mitteltunnel der Bodenstruktur aus 6 und
• 8 eine zweite Anordnung der leitungsähnlichen Elemente aus 7.

Further features and advantages of the invention emerge from the following description of non-restrictive exemplary embodiments of the invention, which are explained in more detail below with reference to the drawing. This drawing shows schematically:

• 1 a perspective bottom view of a body, in particular a floor structure, of a motor vehicle according to an embodiment of the invention,
• 2 a perspective bottom view of the floor structure of the body 1 ,
• 3 a top view of the floor structure 2 from underneath,
• 4th a top view of the floor structure 3 from below and a partial cross-sectional view along the section line AA drawn in the top view,
• 5 a top view of the floor structure 3 from below and a partial cross-sectional view along the section line BB drawn in the top view,
• 6th a top view of the floor structure 3 from below and a partial cross-sectional view along the section line CC drawn in the top view,
• 7th a first arrangement of line-like elements in a central tunnel of the floor structure 6th and
• 8th a second arrangement of the line-like elements 7th .

In the different figures, parts that are equivalent with regard to their function are always provided with the same reference symbols, so that they are usually only described once.

1 Figure 10 is a bottom perspective view of a body 1 of a motor vehicle (not shown further) according to an embodiment of the invention. In this embodiment described herein, the motor vehicle is a hybrid or a plug-in hybrid vehicle, which in addition to at least one electric motor (not shown) also an internal combustion engine (also not shown ) having.

The vehicle body 1 includes a floor structure 2 which in turn have a center tunnel running in the longitudinal direction of the vehicle 3 having a downwardly open profile. Below the soil structure 2 is an in 1 traction battery not shown 4th (see e.g. 6th ) arranged and with the floor structure 2 connected. As 1 can be seen, are on the center tunnel 3 several the center tunnel 3 stiffening reinforcement struts that are firmly connected to this 5 and 6th arranged. In particular, the reinforcement struts in the in 1 illustrated embodiment two longitudinal reinforcing struts 5 as well as five transverse reinforcement struts 6th . The reinforcement struts 5 and 6th form with the in 1 illustrated embodiment a lead frame structure, which consists of the longitudinal reinforcement struts 5 and the cross reinforcement struts connecting them 6th is formed. As will be described in detail below, the traction battery is 4th in this embodiment at least on part of the reinforcement struts 6th attached.

As 1 can be seen, the longitudinal reinforcement struts extend 5 essentially along the longitudinal direction of the vehicle and the transverse reinforcement struts 6th extend essentially along the vehicle transverse direction. The open underside of the center tunnel is accordingly 3 from part of the reinforcement struts 5 , 6th , namely here of the five transverse reinforcement struts 6th , bridged, so that the open cross-section of the central tunnel 3 through the cross reinforcement struts 6th is closed, which significantly increases the rigidity of the center tunnel 3 causes. In particular, make the transverse reinforcement struts 6th with regard to a side impact of an obstacle against the vehicle body 1 , in which the collision forces are essentially in the transverse direction of the vehicle in the body 1 and the soil structure 2 be initiated, additional load paths in the vehicle transverse direction, along which the collision forces can be derived, so that the center tunnel 3 is protected from significant deformation in this case.

Furthermore, the longitudinal reinforcement struts 5 for the center tunnel 3 In particular with regard to a frontal collision of the motor vehicle with an obstacle, additional load paths are prepared in the vehicle longitudinal direction, so that the collision forces acting in the vehicle longitudinal direction with the aid of the longitudinal reinforcement struts 5 can also be effectively derived.

2 Figure 10 is a bottom perspective view of the floor structure 2 the body 1 out 1 alone. The soil structure 2 points to the in 2 illustrated embodiment on both sides of the central tunnel 3 three cross members each extending essentially in the transverse direction of the vehicle 7th on. As in 2 can be seen are the respective the center tunnel 3 facing end sections of the cross member 7th with the center tunnel 3 firmly connected. The opposite end sections of the cross members 7th are accordingly 2 with one longitudinal beam each 8th connected on the left and right sides of the vehicle. With the cross members 7th The exemplary embodiment shown is a seat cross member for fastening seating (not shown) in a passenger compartment (also not shown) of the motor vehicle.

In 3 showing a top view of the floor structure 2 represents from below, it can be seen that in the illustrated embodiment according to the invention a part of the center tunnel 3 bridging reinforcement struts 6th is arranged such that this is the respective with the center tunnel 3 connected end portions of the cross member 7th on both sides of the central tunnel 3 connect with each other. In this way, a closed load path is formed from a cross member 7th on one side of the central tunnel 3 to the respective cross member 7th on the other side of the central tunnel 3 which in particular affects the vehicle body 1 and the soil structure 2 Side impact forces acting on the cross member 7th and the reinforcing struts connecting them 6th can be derived what an early deformation of the soil structure 2 helps to avoid a collision. The cross members represent accordingly 7th In the event of a collision of the motor vehicle with an obstacle, in particular in the event of a side impact, the position of the seating in the passenger compartment is secure and thus ensures sufficient survival space for the occupants of the motor vehicle in this case.

Furthermore, in 3 shown schematically how the two longitudinal reinforcement struts 5 by means of a total of eight screw connections 9 , four screw connections per longitudinal reinforcement strut 5 , at the center tunnel 3 are attached. Furthermore, each cross reinforcement strut 6th two screwing means 10 shown for screwing the traction battery 4th (see e.g. 6th ) on the reinforcement struts 6th serve.

An in 3 indicated floor pan 11 closes the soil structure 2 towards the bottom (facing the viewer). As the cross member 7th in the representation of the floor pan 2 are covered, they are accordingly in 3 Drawn in dashed lines.

4th represents a top view of the floor structure 2 out 3 from below (left half of the figure) and a partial cross-sectional view (right half of the figure) along the section line AA drawn in the top view. The partial cross-sectional view is due to the longitudinally symmetrical construction of the floor structure 2 represents only the left half of the overall cross section along the section line AA. In the partial cross-sectional view of FIG 4th it can be clearly seen that the cross member 7th (Seat cross member) on his the center tunnel 3 facing end section firmly to the center tunnel 3 connected, preferably welded, is. At the attachment point of the cross member 7th at the center tunnel 3 are the partial cross-sectional view of FIG 4th According to a total of three sheets (end section of the cross member 7th , Floor pan 11 and center tunnel 3 ) connected to one another, preferably welded.

5 represents a top view of the floor structure 2 out 3 from below (left half of the figure) and a partial cross-sectional view (right half of the figure) along the section line BB drawn in the top view. The partial cross-sectional view is due to the longitudinally symmetrical construction of the floor structure 2 represents only the left-hand half of the overall cross section along the section line BB. In the partial cross-sectional view of FIG 5 can be seen that on the top of the center tunnel 3 a welding nut 12 for the screw connection 9 the longitudinal reinforcement strut 5 (please refer 3 ) is provided. The course of the central tunnel points accordingly 3 at this point a corresponding shoulder deviating from the otherwise essentially U-shaped cross section, on which the welding nut 12 is attached. The welding nut 12 enables simple assembly or screwing of the respective longitudinal reinforcement strut 5 at the center tunnel 3 from the bottom of the center tunnel 3 .

6th represents a top view of the floor structure 2 out 3 from below (left half of the figure) and a partial cross-sectional view (right half of the figure) along the section line CC drawn in the top view. In the partial cross-sectional view of FIG 6th can be seen as the traction battery 4th with one of the several cross reinforcement struts 6th connected, preferably by means of the screw connection 10 screwed is. For this purpose, the transverse reinforcement strut 6th on their top for each screw connection 10 a welding nut 13 on. As in the partial cross-sectional view of 6th can be seen, the screwing takes place 10 in the illustrated embodiment, preferably by means of the traction battery 4th at this point bridging spacers 14th . The welding nut 13 enables simple assembly or screwing of the traction battery 4th on the respective cross reinforcement strut 6th from the bottom of the cross reinforcement strut 6th .

The partial cross-sectional view of 6th it can also be seen that the traction battery 4th in the transverse direction of the vehicle on both sides of the center tunnel 3 extends and in the area of the central tunnel 3 one extending in the longitudinal direction of the vehicle (perpendicular to the image plane of the partial cross-sectional view), the center tunnel 3 following tunnel-like recess 15th having. In this recess 15th runs in the illustrated embodiment, an exhaust system 16 , especially an exhaust pipe 16 , the internal combustion engine (not shown) of the motor vehicle. As in the partial cross-sectional view of 6th is shown, protrudes the exhaust system 16 in the embodiment shown, not over the underside of the traction battery 4th before, which ensures improved ground clearance of the motor vehicle.

In that of the downwardly open profile of the central tunnel 3 formed intermediate or tunnel space 17th between the top of the traction battery 4th or the transverse reinforcement strut 6th and the arch of the central tunnel running over it 3 are at the in 6th illustrated embodiment in an advantageous manner line-like elements 18th , for example brake lines, fuel lines and / or electrical lines, housed compact and space-saving.

The partial cross-sectional view of 6th are still at the points of the screw connections 9 into the top of the traction battery 4th introduced depressions 19th refer to. These are used to create sufficient space to accommodate the reinforcement strut 5 or. 6th protruding part of the screw connection 9 , for example a screw head.

7th represents a first specific arrangement of the line-like elements 18th out 6th in the center tunnel 3 represent. 8th represents a second specific arrangement of the conduit-like elements 18th out 6th in this 7th it can be seen that the line-like elements 18th , for example brake lines, fuel lines and / or electrical lines and the like, which preferably have a smaller diameter than that in the partial cross-sectional view of FIG 6th illustrated exhaust system 16 , on the inside of the center tunnel 3 are attached. In contrast, the lines are 18th in 8th on the reinforcement struts 5 and or 6th attached and preferably already before the assembly of the reinforcement struts 5 and or 6th at the center tunnel 3 pre-assembled on this.

The motor vehicle according to the invention was explained in more detail with reference to the exemplary embodiments shown in the figures. However, the motor vehicle is not limited to the embodiment described herein, but also includes other embodiments that have the same effect.

List of reference symbols

1

Body, vehicle body, automobile body

2

Soil structure

3

Center tunnel

4th

Traction battery

5

Longitudinal reinforcement strut, reinforcement strut

6

Cross reinforcement strut, reinforcement strut

7th

Cross member, seat cross member

8th

Side member

9

Screw connection of 5 at 3

10

Screw connection of 4th at 6th

11

Floor pan

12

Welding nut on 3

13th

Welding nut on 6th

14th

Spacer

15th

Recess

16

Exhaust system, exhaust pipe

17th

Intermediate / tunnel space

18th

Lines, line-like elements

19th

deepening

Claims (9)

Motor vehicle which is at least partially electrically operated, comprising a floor structure (2) of a motor vehicle body (1) and a traction battery (4) which is arranged on an underside of the floor structure (2) and connected to it, the floor structure (2) having a has a central tunnel (3) extending in the longitudinal direction of the vehicle with a downwardly open profile, on the central tunnel (3) several reinforcing struts (5, 6) stiffening the central tunnel (3) and firmly connected to it are arranged, at least on the traction battery (4) attached to a part of the reinforcement struts (5, 6) and at least one reinforcement strut (6) is arranged bridging the center tunnel (3), characterized in that the floor structure (2) on both sides of the center tunnel (3) at least one substantially in each case Vehicle transverse direction extending cross member (7), each with its end portion facing the center tunnel (3) with the Mi tteltunnel (3) is firmly connected and the at least one reinforcement strut (6) bridging the center tunnel (3) is arranged in such a way that it connects the respective end sections of the cross members (7) on both sides of the center tunnel (3). Motor vehicle after Claim 1 , characterized in that the open underside of the center tunnel (3) is bridged by at least part of the reinforcement struts (6). Motor vehicle after Claim 1 or 2 , characterized in that at least some of the reinforcement struts (5) extend essentially in the longitudinal direction of the vehicle. Motor vehicle according to one of the preceding claims, characterized in that the reinforcement struts (5, 6) are screwed to the center tunnel (3). Motor vehicle according to one of the preceding claims, characterized in that the traction battery (4) is screwed to the reinforcing struts (5, 6) to which it is attached. Motor vehicle after Claim 1 , characterized in that the cross member (7) is a seat cross member for attaching a seat. Motor vehicle according to one of the preceding claims, characterized in that the reinforcement struts (5, 6) form a ladder frame structure, the at least two longitudinal reinforcement struts (5) extending essentially in the longitudinal direction of the vehicle and several transverse reinforcement struts (6) connecting them to one another and bridging the center tunnel (3). includes. Motor vehicle according to the preceding claim, characterized in that the longitudinal reinforcement struts (5) are attached to the center tunnel (3) and the traction battery (4) is attached to at least part of the transverse reinforcement struts (6). Motor vehicle according to one of the preceding claims, characterized in that the traction battery (4) extends in the transverse direction of the vehicle on both sides of the central tunnel (3) and in the area of the central tunnel (3) a tunnel-like recess extending in the longitudinal direction of the vehicle and following the central tunnel (3) (15), in which an exhaust system (16) of an internal combustion engine runs.

Images